latex 中的引号问题
参考：
* https://tex.stackexchange.com/questions/10670/quotes-in-latex
* http://www.yeslib.com/detail/3588
不做深入讨论，因为在xelatex下使用utf8，可以直接输入引号。如果要考虑一些特殊情况，可以参考如下的内容：
## Can I just use ' for the quotes in my document?
Q：I'm asking this because when I use them in my TextMate editor the included text is highlighted with a red color. Therefore, I was wondering if I should instead some other symbol preceded by \.
A: Harald Hanche-Olsen：
Yes, you can, but you shouldn't. Instead, use ``quoted'' to get the result “quoted”, assuming you are writing English. Some languages prefer quotes like «this» or like »that«, and those you can enter directly, provided you have the right input encoding set up. (You can input “ and ” directly too, if you use a utf-8 input encoding.)
Note that in some languages, babel uses the ' character for various purposes not related to quotation marks, so it really is best to avoid it.
A: Martin Scharrer
In
参考：
* https://tex.stackexchange.com/questions/10670/quotes-in-latex
* http://www.yeslib.com/detail/3588
不做深入讨论，因为在xelatex下使用utf8，可以直接输入引号。如果要考虑一些特殊情况，可以参考如下的内容：
## Can I just use ' for the quotes in my document?
Q：I'm asking this because when I use them in my TextMate editor the included text is highlighted with a red color. Therefore, I was wondering if I should instead some other symbol preceded by \.
A: Harald Hanche-Olsen：
Yes, you can, but you shouldn't. Instead, use ``quoted'' to get the result “quoted”, assuming you are writing English. Some languages prefer quotes like «this» or like »that«, and those you can enter directly, provided you have the right input encoding set up. (You can input “ and ” directly too, if you use a utf-8 input encoding.)
Note that in some languages, babel uses the ' character for various purposes not related to quotation marks, so it really is best to avoid it.
A: Martin Scharrer
In